Boanthropy: The Rare Condition Where People Believe They're Turning Into Cattle

I recently discovered one of the strangest corners of psychiatry: boanthropy. And to be honest, this might be one of the weirdest things I've encountered.

Boanthropy is a rare psychiatric condition where a person genuinely believes they're transforming into - or have already become - a cow or ox. Yes, I'm serious. Not metaphorically "feeling like cattle," but actually experiencing a delusional belief that they are bovine.

And let me say this upfront: no, I'm not making this up. It's documented in psychiatric literature, but it's extremely rare.

The Most Famous Case? A Biblical King

The most well-known historical example of boanthropy is King Nebuchadnezzar II of Babylon. You might recognize him from the Book of Daniel in the Bible. In the narrative of Daniel 4, the king withdraws from people, begins eating grass, and lives like an animal for seven years.

Now, this isn't a definitive medical diagnosis, of course. This is a retrospective interpretation from an ancient religious text. But some modern commentators associate these behavioral descriptions with boanthropy. Phrases like "eating grass," "living like wild animals," and "nails growing like bird claws" actually appear in the text.

Is it interesting as a historical curiosity? Absolutely. Is it a definitive diagnosis? No. But it's notable for showing how far back the concept of boanthropy goes.

Real Cases in Modern Times

So do such cases exist today? Yes, but incredibly rare.

The most cited modern case in psychiatric literature is a 2019 report from Iran. A 60-year-old patient presented with major depression and reported perceiving himself as a bovine.

Systematic reviews from 2021 and 2025 indicate that boanthropy and similar animal transformation delusions (zoanthropy or therianthropy) are very rare and typically appear alongside psychosis spectrum disorders, psychotic depression, and bipolar disorder.

What Happens in Boanthropy?

A person experiencing this condition doesn't just say "I feel like I resemble a cow." In some documented cases, we see attempts to walk on all fours, making animal sounds (mooing), mimicking grazing behavior, seeing their face change in mirrors, and wanting to eat grass.

But note: these don't appear the same way in every case. Boanthropy isn't a standalone illness - it's a delusional content that emerges within an underlying psychiatric condition.

So How Is This Treated?

Good news: it can be treated. Bad news: it's not easy.

Treatment typically involves antipsychotic medications (to reduce delusions), antidepressants or mood stabilizers when necessary, and intensive psychiatric follow-up.

Some patients show significant improvement, while in other cases the process can be longer and more challenging. Everything depends on the severity of the underlying psychiatric condition.

There Are Other Strange Syndromes in the Same Family

Would you be surprised if I told you boanthropy isn't alone? Actually, it's part of a much broader group called zoanthropy - delusional conditions where a person believes they're transforming into an animal.

For example,  Clinical Lycanthropy >> - where people believe they're transforming into wolves. Or kynanthropy - the delusion of transforming into a dog. The list goes on.

But they all share a common thread: the issue isn't "magic" or "legend," but rather a person's sense of self becoming severely disrupted through heavy delusion. It shows how dramatically one of the brain's most fundamental functions - self-identity - can change during psychosis.

This makes conditions like boanthropy both disturbing and incredibly fascinating from a psychiatric perspective.

Final Thoughts

Boanthropy is one of the strangest corners of psychiatry. It's not well known in popular culture, but it's extremely valuable for reminding us how complex and fragile the human mind is. These cases reveal something more striking than supernatural narratives: When the brain's identity perception becomes severely disrupted, a person can experience their own self as an entirely different being.